Nissan Altima 2007-2012 Service Manual: Front tweeter (coupe)
Description
The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the front tweeters using the audio signal circuits.
Diagnosis Procedure
1.HARNESS CHECK
1. Disconnect BOSE speaker amp. connector B122 and suspect tweeter connector.
2. Check continuity between BOSE speaker amp. harness connector B122 (A) and suspect tweeter harness connector (B).
3. Check continuity between BOSE speaker amp. harness connector B122 (A) and ground.
Are continuity test results as specified? YES >> GO TO 2
NO >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
2.FRONT TWEETER SIGNAL CHECK
1. Connect BOSE speaker amp. connector B122 and suspect tweeter connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connector B122 terminals with CONSULT-III or oscilloscope.
Are voltage readings as specified? YES >> Replace suspect tweeter. Refer to AV-440, "Removal and Installation".
NO >> GO TO 3
3.HARNESS CHECK
1. Disconnect AV control unit connector M47 and BOSE speaker amp. connector B121.
2. Check continuity between AV control unit harness connector (A) M47 and BOSE speaker amp. harness connector B121 (B).
3. Check continuity between AV control unit harness connector B121 (A) and ground.
Are continuity test results as specified? YES >> GO TO 4
NO >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
4.FRONT TWEETER SIGNAL CHECK
1. Connect AV control unit connector and BOSE speaker amp.
connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector terminals with CONSULT-III or oscilloscope.
Are voltage readings as specified? YES >> Replace BOSE speaker amp. Refer to AV-438, "Removal and Installation - Coupe".
NO >> Replace AV control unit. Refer to AV-437, "Removal and Installation".
Front door speaker (sedan)
Description
The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker
amp. amplifies the audio
signals before sending them to the front door speakers using the audio signal
c ...
Tweeter (sedan)
Description
The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker
amp. amplifies the audio
signals before sending them to the tweeters using the audio signal circuits.
Dia ...
Other materials:
Satellite radio antenna
Removal and Installation
REMOVAL
1. Lower the headliner at the rear. Refer to INT-20, "Removal and
Installation" (coupe) and INT-42,
"Removal and Installation" (sedan).
2. Remove the satellite radio antenna nut (A), then disconnect the
satellite radio antenna connector ( ...
AM radio reception
AM signals, because of their low frequency, can
bend around objects and skip along the ground.
In addition, the signals can be bounced off the
ionosphere and bent back to earth. Because of
these characteristics, AM signals are also subject
to interference as they travel from transmitter
to r ...
Positive crankcase ventilation
Description
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase
blow-by gas to the intake
manifold.
During partial throttle operation of the engine, the intake manifold sucks the
blow-by gas through th ...